Hub
Dam is located 35 miles north of Karachi on the Hub River. The dam has a gross storage of
857,000 acre feet of water and submerged 20,360 acres of barren land. Its live storage
capacity is 760,000 acre feet, and its expected life is 75 years. The spillway, 6,020 feet
long, is located on the right bank and has a discharge capacity of 471,500 cusecs. The
crest length of the embankment is 352 feet.

Kalabagh Dam

Kalabagh
Dam is a multi-purpose project proposed to be constructed on the Indus River just below
the confluence of Soan River, 118 miles downstream of Tarbela Dam and 14 miles upstream of
Jinnah Barrage. It is to have a crest elevation of 940 feet and a length of 11,000 feet.
It will have a useable storage capacity of 6.1 million acre feet of water, generate 2,400
megawatts of power initially and 3,600 megawatts ultimately, and provide significant flood
alleviation benefits.

First
proposed in the 1950s, the project was seriously planned in the 1980s but encountered
political resistance from the NWFP and Sindh provinces. There is also disagreement over
whether irrigation works should or should not be part of the project.

With
the cost of the project escalating as time goes by, the government is now pursuing a
programme of thermal power generation, has begun work on a hydropower plant at Ghazi
Barotha, and is studying other options, such as small hydel dams and alternate large dams
sites on the Indus.

Khanpur Dam

Khanpur
Dam has been constructed in a narrow gorge on the Haro River. It is located 8 miles north
of Taxila on the Haripur Road, about 25 miles from Islamabad. It is a multipurpose project
which supplies drinking water to Islamabad and Rawalpindi and irrigation water to NWFP
(110 cusecs) and Punjab (87 cusecs).

Khanpur
village, from which the dam derives its name, has been submerged by the reservoir, so a
new Khanpur town has been built downstream of the Dam. The dam is 167 feet high and stores
106,000 acre feet of water. Construction was started in 1968 and completed in 1983 at a
cost of Rs.1,352 million.

Mangla
Dam

The
Mangla Dam on the River Jhelum is one of the longest earth-fill dams in the world. The
Indus Basin treaty of 1960 with India paved the way for its construction. The treaty
provided for two dams, one on the River Jhelum at Mangla and the other on the Indus at
Tarbela.

It
is an earthen dam 330 feet high and 11,000 feet long, with a crest elevation of 1,234
feet. Besides the main dam, Sukian Dyke, 17,000 feet in length, and a small dam 3,700 feet
long to block the Jari Nala were also constructed. Jari Dam is 11 miles from New Mirpur.

Mangla
Dam has two spillways on the right side. The main spillway has a normal service capacity
of 900,000 cusecs. It has nine gates 36 feet wide and 40 feet high. The second is an
emergency spillway. Its design provides for a future increase of 48 feet in height.

Rawal Dam

Rawal
Dam was built across the Korang Nallah, 9 miles from Rawalpindi, between 1960 and 1962. It
is a concrete dam 700 feet long, 100 feet above the river bed. It has a storage capacity
of 47,500 acre feet and covers 3.5 square miles. Along the right side is an outlet for 112
cusecs of water supply, 32 cusecs (16.5 million gallons per day) for urban water supply
and the rest for irrigation.

In
recent years, the supply of water for irrigation has been curtailed due to an increased
demand for urban drinking water.

Tanda Dam

Tanda
Dam is an earth-fill dam 115 feet high and 2,200 feet long, 30 feet wide at the top and
with a base width of 815 feet. Tanda Dam was built 4 miles west of Kohat (NWFP) so as to
impound the surplus water of the Kohat Toi, a right bank tributary of the Indus, during
high floods into on off-channel reservoir with a storage capacity of 78,000 acre feet. Its
live storage capacity is 64,000 acre feet, and it irrigates 32,000 acres of land with 145
percent cropping intensity every year.

Tarbela Dam

Tarbela
one of the largest earth-filled dams in the world and the largest dam in Pakistan is
designed to store the waters of the Indus at a point where the river leaves the Himalayan
foothills to enter the Potohar Plateau. After some questioning and hesitation, the
international community of donors agreed to finance the dam out of the financial resources
that were made available for the Indus waters replacement works. Construction was started
in 1968. Scheduled for completion in 1975, it was actually completed in 1974.

The
earth-and-rock fill dam is 485 feet high. The crest elevation is 1,565 feet, and it is
9,000 feet in length. It has two irrigation outlets and two outlets for power generation.
Each tunnel is 45 feet in diameter and 2,400 feet long.

The
dam has two spillways, the service spillway and an auxilliary spillway, both located on
the left side. The main spillway has 7 gates, each 50 feet wide and 50 feet high. The
discharge capacity is 650,000 cusecs. Its power generating capacity is 1,400 megawatts at
present and will eventually be increased to 4,000 megawatts.

Warsak
Dam

In
August 1947, at the time of Independence, the only water storage dam in Pakistan was Namal
Dam in Mianwali District in the Punjab. It was constructed in 1913 to store about 22,364
acre feet of water for local use.

After
Independence, the Warsak Dam was constructed on the Kabul River about 19 miles northwest
of Peshawar. Completed in 1960, the dam is 460 feet long and 250 feet high. Its spillway
has 9 gates of 40 feet each.

The
dam has a maximum discharge capacity of 540,000 cusecs, and 500 cusecs through an
irrigation tunnel is 3-1/2 miles long and 10 feet in diameter. Warsak Dam has six power
units of 40,000 kilowatts each, for a total power generation capacity of ?.